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Fruit fly, fruit parasite ... rotten

Who's the fruit fly ?

mouche à fruit Drosophila melanogasterLatin name: Drosophila melanogaster
Order: Diptères
Family: drosophilides
Size: 2 to 3 mm
Location: all places

What you need to know about the fruit fly

Although similar in size, it is not necessary to confuse the mustard and the fruit fly. The mustard prefers by far, organic matter found in the soils, with fruit.
The fruit fly (also known as vinegar fly or wine fly) is mainly interested in putrefaction waste, especially fruit and vegetables. It is also found in places where there is a presence of soft drinks, alcohol, beer, ice cream and flour in fermentation and of course waste bins and containers for recyclable materials that are perfect places for reproduction.

The complete adult egg cycle is fast enough, from 10 to 20 days. their presence is observed in the spring and summer, it is always more important when ripening the various fruits that attract them.

Close to the maturity of the grape, the adults are attracted by the volatile odors released by the berries. These odors are clear from the parasitic or accidental injuries of the grapes. sooting is used as a food for drosophiles that, at the same time, bring to their bodies and reject various microorganisms, including those associated with acid rot. the females then lay their fertilized eggs on the berries. Females lay more or less 300 to 400 eggs, about five at a time, in rotten fruit or other fermentation material (humidity and yeast).

Larvae hatch quickly after 24 hours. They then feed on the complex mixture yeast-bacterial and medium in fermentation. Three larval stages follow each other in the bays to the nymphosis (training a pup) on the spot and then appearance of adults who will mate and will have the ability to contaminate new bays.

Larvae feeding promotes the dilaceration of berry tissues. their feces, containing micro-organisms, will amplify the development of volatile acidity, attracting new adults.


The fruit fly in details

Drosophila melanogaster

Like all insects, the drosophile has three pairs of legs. Like all dipters, it has only one pair of functional wings, the previous ones, while the posteriors are atrophied in the form of a tiny balance. dipteras are usually small (one inch to the maximum): drosophiles are the smallest representatives. The best known dipters are of course flies, mosquitoes and cousins, but in the laboratories it is especially the drosophile that makes unanimity. His name means "who loves dew", but in ancient Greek "droso" means also nectar, divine liqueur, wine. in French, it is more commonly referred to as vinegar fly because it is found on well-matured or decomposition fruit, but it could be called "wine fly"..

Drosophile is a hygrophile insect (which loves moisture) and lucicole (which loves light). Adults are sex with males and females. after mating, the females deposit on the middle, usually the fruits, eggs about 0.5 millimetres long, of the shape of a rugby balloon. 30 hours after the deck, the eggs will bloom and give birth to a whitish larva (also known as "asticot") of about 5 mm in length. It then feeds on the pulp of the fruit by digging galleries. at the end of its growth period, 5 to 6 days later and three later larvae stages, the larvae ramps up to a dry portion of food, or on the outside, to turn into pup. It is inside this cocoon that the metamorphosis will take place that will give the day to a winged adult insect. The latter will then mate in turn. Only one female can generate several hundred descendants.


- eggs have a smooth hull, sometimes carrying 2 to 8 subapical filaments;
- the larva has a vermiform, asticot-like appearance, with a non-different head (acephalia) bleaching, and a size of 3 to 5 mm, apode and very active;
- the pup that has the shape of a tonnelet, is brown more or less clear, sometimes yellowish, and has expansions on each side of the last segment;
- the adult is a fly with spotless hyaline wings, red compound eyes, and a yellowish to brownish colouration.


Damage and nuisability of the fruit fly

Drosophila melanogasterOn crops
Adult fruit flies are strongly attracted to odorant substances, alcohol type, organic acids and acetic ethers secreted by injured berries, especially when the harvest is late and the cultivated grape is white. These lesions are due, either to accidental injuries associated with different abiotic stress or human activity, or to attacks by different bioagressers (tordose, oïdium).

The females lay their eggs from which the larvae, hygrophyles and luciculture emerge, which proliferate in the bays already colonized by yeasts (kloeckera apiculata, candida stellata). or bacteria (gluconobacter spp. acetobacter spp). associated with acid rot. Let's add that they can also carry these microorganisms.

The direct harm of fruit flies to the vine is not at issue, but it is the indirect role they play as a vector and aggravating factor of acid rot in the larval stage that classifies them among the potential pests of this crop.


Fruit flies are particularly unpleasant at home, especially since they reproduce at a very fast pace.
Fruit flies affectionate the remains of food, the fruits that are brought back from the market, in which they lay their eggs

How to eliminate the fruit fly ?

Preventive measures
- keep the fruits and vegetables in the refrigerator vegetable tray or under a glass bell or a veil.
- a fruit rotten or too ripe, as well as the remains of meals and preparations (spoils). must immediately be thrown into a trash - always! - closed.
- do not leave open glasses or bottles containing a drinking background (limonade, wine, beer).
- wash the inside of his kitchen trash twice a month with vinegared water.


In curative
- in various locations at risk, place small pots with white vinegar and hot water added to dishes (proportion 50/50). fruit flies will be attracted and will drown in this mixture.
- in a small container, soak a piece of fruit in balsamic vinegar. cover with food film and drill a few holes. Dried, the darts will come in by these little openings and will be trapped. It will then be enough to get rid of it by liberating them outside the house.
- use of fruit trap Kapo Green. the attractive made of vinegar (cedar and balsamic) will attract fruit flies and they will be trampled by sticking on the engluted surface of the trap.
- our aerosols all insects Ecodoo and flying insecticide Aries will remove them very quickly in direct spraying.
- Finally, our fogger habitat Biovétol give good results on this type of insect. It is a plant-based insecticide (pyrethre + géraniol) for the background treatment of the habitat. very volatile, the solution is deposited in the smallest corners where pests and insects are located. immediate and prolonged action. 3 different formats exist: 75ml for treatment less than 15m2, 150ml, for treatment less than 30 m2. Finally, 250ml, for treatment greater than 30m2.

Fogger Habitat with plant-based active...

This is fogger composed of plant-based assets is intended for the background treatment of the habitat in case of infestation by mites,...
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This is what the fruit fly looks like under the microscope